In order to solve transport problems of industry solid,firstly,a new applicationnotion of pipeline transport was presented,that is to say,combining pretreatment andtransport with disposal techniques of industry solid ...In order to solve transport problems of industry solid,firstly,a new applicationnotion of pipeline transport was presented,that is to say,combining pretreatment andtransport with disposal techniques of industry solid waste.Secondly,the integrated dis-posal and transport system for industry solid waste was introduced,in particular,the oper-ating principles,equipment set-up,key technology and technical parameters.Next,thispaper illustrated the application of this integrated system.Such as it can transport coalsludge with sufficiently high solids content(about 72%～77%)and high apparent viscosity(about 1 000～3 000 Pa.s)directly by pipeline having no use for water and addition agent.Generally,the transport distance is about 1 000 m.This system has been successfullyused in innocuous disposition and efficient utilization of other industrial byproducts or solidwastes,such as city sludge and paper making waste.The integrated system causes nopollution to the environment for its complete seal and realizes protecting the environment,conserving the energy,promoting the development of cycling economic.Finally,the paperdiscussed the research works that were needed for studying such pipeline transport sys-tem and narrates the relevant condition and application status.展开更多
Rapid industrialization in Vietnam has resulted in the difficult task of finding means to properly manage the generation of industrial waste. In an attempt to deal with this problem, the Vietnamese government revised ...Rapid industrialization in Vietnam has resulted in the difficult task of finding means to properly manage the generation of industrial waste. In an attempt to deal with this problem, the Vietnamese government revised the Law on Environmental Protection of 2005, with which it imposed strict regulations on industrial waste generators and the waste they discharge. However, questions remain about the current industrial solid waste management system because of the discrepancy between the ideals embodied in the Law and the actual practices occurring in industry. We report here on the effectiveness of governmental policies, focusing on environmental performance in industrial zones in Ho Chi Minh City （HCMC）, Vietnam. We examined government records, and reports from waste generators, as well as waste treatment methods at sites. In addition, on-site surveys were carried out at 44 companies in HCMC in 2009 and 2010 to obtain a better understanding of the companies＇ handling of and attitude toward the industrial waste they produced. Our results show that the incoherence of the revised Law and regulations in industrial waste management has caused a serious pressure on domestic landfills. We conclude that there is a strong need for change in the current regulatory and management system in order to increase the effectiveness of environmental management for future sustainable development.展开更多
On the basis of panel data from 29 provinces and cities throughout the country in 2006-2010, a research is made on factors influencing regional industrial solid waste comprehensive utilization ability through a regres...On the basis of panel data from 29 provinces and cities throughout the country in 2006-2010, a research is made on factors influencing regional industrial solid waste comprehensive utilization ability through a regression analysis method. Research result shows that a positive influence will generate on the comprehensive utilization ability of the industrial solid waste by three factors： regional industrial soldi waste treatment earning level, regional industrial soldi waste treatment investment level and regional industrial pollution treatment subsidy strength. And this thesis will propose suggestions from improving earning ability, enhartcing treatment investment and increasing government subsidy depending on result of empirical analysis.展开更多
Growth of population and extensive industrial development had increases solid wastes and pollutants in many parts of the world. Due to the economic and technologic limitations not all waste can be easily turn to other...Growth of population and extensive industrial development had increases solid wastes and pollutants in many parts of the world. Due to the economic and technologic limitations not all waste can be easily turn to other sort of materials or energy. As a result so, we still have to rely on the common solution to bury as to excrete urban wastes. Selection of an appropriate site for this process in a big city like Mashad in Iran is an important task which needs a cautious, strategic planning and investigations at various levels. With regards to this issue it is necessary to have a comprehensive volume of spatial information of the surrounding area and a proper analysis and spatial exploration need to be done. The methodology being implemented utilized geospatial technology for the management and visualization of spatial data while fuzzy logic is used in searching the best location for site selection. In this paper the basic elements of the fuzzy logic methodology as well as its potential in the specific problem are described. A case study for Mashad city is elaborated. The results drawn up by fuzzy logic are compared with that of the traditional Boolean approach in the decision making process.展开更多
With the global promotion of LED lighting products, the health and safety of LED products has drawn wider attention. This paper systematically introduces the ergonomic evaluation （methods and indicators） svstem for ...With the global promotion of LED lighting products, the health and safety of LED products has drawn wider attention. This paper systematically introduces the ergonomic evaluation （methods and indicators） svstem for heahh and comfort which differs from the traditional manpowered physical detection, and sketches out the evaluation indicators and its industrialization prospect.展开更多
The transition-metal-catalyzed copolymerization of olefins with polar comonomers is a direct strategy to access polar-functionalized polyolefins in an economical manner.Due to the intrinsic poisoning effect of polar g...The transition-metal-catalyzed copolymerization of olefins with polar comonomers is a direct strategy to access polar-functionalized polyolefins in an economical manner.Due to the intrinsic poisoning effect of polar groups towards Lewis acidic metal centers and the drastic reactivity differences of polar comonomers versus non-polar olefins,it is challenging to develop catalysts that provide the desired polymer molecular weight,comonomer incorporation,and activity.In this contribution,we tackle this issue from a comonomer perspective using 5,6-disubstituted norbornenes,which are highly versatile,easily accessible,inexpensive,and capable of introducing two functional groups in a single insertion.More importantly,they are only mildly poisoning due to the presence of long spacers between double bonds and polar groups,and are not prone to b-hydride elimination due to their cyclic structures.As strong pdonors,they can competitively bind to metal centers versus olefins.Indeed,phosphine-sulfonate palladium catalysts can catalyze the copolymerization of ethylene with 5,6-disubstituted norbornenes and simultaneously achieve a high polymerization activity,copolymer molecular weight,and comonomer incorporation.The practicality of this system was demonstrated by studying the properties of the resulting polymers,copolymerization in hydrocarbon solvents or in bulk,recovery/utilization of unreacted comonomer,molecular weight modulation,and large-scale synthesis.展开更多
Vermicomposting is a biotechnological process that enables the recycling of organic waste materials into manure through the combined action of earthworms and mesophilic microorganisms. In this study, a 13-week experim...Vermicomposting is a biotechnological process that enables the recycling of organic waste materials into manure through the combined action of earthworms and mesophilic microorganisms. In this study, a 13-week experiment was carried to vermiprocess food industry sludge mixed with different bedding materials including two weeds, water hyacinth and parthenium, as well as cow dung, in different combinations employing earthworms of the species Eisenia fetida. Eight vermibins containing one kilogram of the waste mixtures （dry weight basis） were established for vermicomposting. Vermiprocessing significantly increased nitrogen, phosphorous, and potassium contents of the mixtures. However, a decrease in pH, organic carbon, and C：N ratio was observed after vermiprocessing. The heavy metal contents in the vermicomposts were higher than the initial values but within permissible limits. These results indicated that the studied wastes can be converted into good quality manure by vermiprocessing, which indicated their agricultural values as a soil conditioner if mixed with weeds in appropriate ratios.展开更多
基金Science and Technology Corporation Innovation Fund of China(02C26211100499) PH.D Program Fund(20020290011)
文摘In order to solve transport problems of industry solid,firstly,a new applicationnotion of pipeline transport was presented,that is to say,combining pretreatment andtransport with disposal techniques of industry solid waste.Secondly,the integrated dis-posal and transport system for industry solid waste was introduced,in particular,the oper-ating principles,equipment set-up,key technology and technical parameters.Next,thispaper illustrated the application of this integrated system.Such as it can transport coalsludge with sufficiently high solids content(about 72%～77%)and high apparent viscosity(about 1 000～3 000 Pa.s)directly by pipeline having no use for water and addition agent.Generally,the transport distance is about 1 000 m.This system has been successfullyused in innocuous disposition and efficient utilization of other industrial byproducts or solidwastes,such as city sludge and paper making waste.The integrated system causes nopollution to the environment for its complete seal and realizes protecting the environment,conserving the energy,promoting the development of cycling economic.Finally,the paperdiscussed the research works that were needed for studying such pipeline transport sys-tem and narrates the relevant condition and application status.
文摘Rapid industrialization in Vietnam has resulted in the difficult task of finding means to properly manage the generation of industrial waste. In an attempt to deal with this problem, the Vietnamese government revised the Law on Environmental Protection of 2005, with which it imposed strict regulations on industrial waste generators and the waste they discharge. However, questions remain about the current industrial solid waste management system because of the discrepancy between the ideals embodied in the Law and the actual practices occurring in industry. We report here on the effectiveness of governmental policies, focusing on environmental performance in industrial zones in Ho Chi Minh City （HCMC）, Vietnam. We examined government records, and reports from waste generators, as well as waste treatment methods at sites. In addition, on-site surveys were carried out at 44 companies in HCMC in 2009 and 2010 to obtain a better understanding of the companies＇ handling of and attitude toward the industrial waste they produced. Our results show that the incoherence of the revised Law and regulations in industrial waste management has caused a serious pressure on domestic landfills. We conclude that there is a strong need for change in the current regulatory and management system in order to increase the effectiveness of environmental management for future sustainable development.
文摘On the basis of panel data from 29 provinces and cities throughout the country in 2006-2010, a research is made on factors influencing regional industrial solid waste comprehensive utilization ability through a regression analysis method. Research result shows that a positive influence will generate on the comprehensive utilization ability of the industrial solid waste by three factors： regional industrial soldi waste treatment earning level, regional industrial soldi waste treatment investment level and regional industrial pollution treatment subsidy strength. And this thesis will propose suggestions from improving earning ability, enhartcing treatment investment and increasing government subsidy depending on result of empirical analysis.
文摘Growth of population and extensive industrial development had increases solid wastes and pollutants in many parts of the world. Due to the economic and technologic limitations not all waste can be easily turn to other sort of materials or energy. As a result so, we still have to rely on the common solution to bury as to excrete urban wastes. Selection of an appropriate site for this process in a big city like Mashad in Iran is an important task which needs a cautious, strategic planning and investigations at various levels. With regards to this issue it is necessary to have a comprehensive volume of spatial information of the surrounding area and a proper analysis and spatial exploration need to be done. The methodology being implemented utilized geospatial technology for the management and visualization of spatial data while fuzzy logic is used in searching the best location for site selection. In this paper the basic elements of the fuzzy logic methodology as well as its potential in the specific problem are described. A case study for Mashad city is elaborated. The results drawn up by fuzzy logic are compared with that of the traditional Boolean approach in the decision making process.
文摘With the global promotion of LED lighting products, the health and safety of LED products has drawn wider attention. This paper systematically introduces the ergonomic evaluation （methods and indicators） svstem for heahh and comfort which differs from the traditional manpowered physical detection, and sketches out the evaluation indicators and its industrialization prospect.
基金the National Natural Science Foundation of China(52025031,21690071,U19B6001,and U1904212)K.C.Wong Education Foundation。
文摘The transition-metal-catalyzed copolymerization of olefins with polar comonomers is a direct strategy to access polar-functionalized polyolefins in an economical manner.Due to the intrinsic poisoning effect of polar groups towards Lewis acidic metal centers and the drastic reactivity differences of polar comonomers versus non-polar olefins,it is challenging to develop catalysts that provide the desired polymer molecular weight,comonomer incorporation,and activity.In this contribution,we tackle this issue from a comonomer perspective using 5,6-disubstituted norbornenes,which are highly versatile,easily accessible,inexpensive,and capable of introducing two functional groups in a single insertion.More importantly,they are only mildly poisoning due to the presence of long spacers between double bonds and polar groups,and are not prone to b-hydride elimination due to their cyclic structures.As strong pdonors,they can competitively bind to metal centers versus olefins.Indeed,phosphine-sulfonate palladium catalysts can catalyze the copolymerization of ethylene with 5,6-disubstituted norbornenes and simultaneously achieve a high polymerization activity,copolymer molecular weight,and comonomer incorporation.The practicality of this system was demonstrated by studying the properties of the resulting polymers,copolymerization in hydrocarbon solvents or in bulk,recovery/utilization of unreacted comonomer,molecular weight modulation,and large-scale synthesis.
基金Supported by the University Grants Commission(UGC),India
文摘Vermicomposting is a biotechnological process that enables the recycling of organic waste materials into manure through the combined action of earthworms and mesophilic microorganisms. In this study, a 13-week experiment was carried to vermiprocess food industry sludge mixed with different bedding materials including two weeds, water hyacinth and parthenium, as well as cow dung, in different combinations employing earthworms of the species Eisenia fetida. Eight vermibins containing one kilogram of the waste mixtures （dry weight basis） were established for vermicomposting. Vermiprocessing significantly increased nitrogen, phosphorous, and potassium contents of the mixtures. However, a decrease in pH, organic carbon, and C：N ratio was observed after vermiprocessing. The heavy metal contents in the vermicomposts were higher than the initial values but within permissible limits. These results indicated that the studied wastes can be converted into good quality manure by vermiprocessing, which indicated their agricultural values as a soil conditioner if mixed with weeds in appropriate ratios.
